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Support ALTER THING .. DEPENDS ON EXTENSION

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This introduces a new dependency type which marks an object as depending
on an extension, such that if the extension is dropped, the object
automatically goes away; and also, if the database is dumped, the object
is included in the dump output.  Currently the grammar supports this for
indexes, triggers, materialized views and functions only, although the
utility code is generic so adding support for more object types is a
matter of touching the parser rules only.

Author: Abhijit Menon-Sen
Reviewed-by: Alexander Korotkov, Álvaro Herrera
Discussion: http://www.postgresql.org/message-id/20160115062649.GA5068@toroid.org
This commit is contained in:
Alvaro Herrera
2016-04-05 18:38:54 -03:00
parent 41ea0c2376
commit f2fcad27d5
23 changed files with 524 additions and 5 deletions
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56
src/backend/parser/gram.y
View File

@ -233,7 +233,8 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query);
AlterEventTrigStmt
AlterDatabaseStmt AlterDatabaseSetStmt AlterDomainStmt AlterEnumStmt
AlterFdwStmt AlterForeignServerStmt AlterGroupStmt
AlterObjectSchemaStmt AlterOwnerStmt AlterOperatorStmt AlterSeqStmt AlterSystemStmt AlterTableStmt
AlterObjectDependsStmt AlterObjectSchemaStmt AlterOwnerStmt
AlterOperatorStmt AlterSeqStmt AlterSystemStmt AlterTableStmt
AlterTblSpcStmt AlterExtensionStmt AlterExtensionContentsStmt AlterForeignTableStmt
AlterCompositeTypeStmt AlterUserStmt AlterUserMappingStmt AlterUserSetStmt
AlterRoleStmt AlterRoleSetStmt AlterPolicyStmt
@ -578,7 +579,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query);
CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER CURSOR CYCLE
DATA_P DATABASE DAY_P DEALLOCATE DEC DECIMAL_P DECLARE DEFAULT DEFAULTS
DEFERRABLE DEFERRED DEFINER DELETE_P DELIMITER DELIMITERS DESC
DEFERRABLE DEFERRED DEFINER DELETE_P DELIMITER DELIMITERS DEPENDS DESC
DICTIONARY DISABLE_P DISCARD DISTINCT DO DOCUMENT_P DOMAIN_P DOUBLE_P DROP
EACH ELSE ENABLE_P ENCODING ENCRYPTED END_P ENUM_P ESCAPE EVENT EXCEPT
@ -767,6 +768,7 @@ stmt :
| AlterForeignTableStmt
| AlterFunctionStmt
| AlterGroupStmt
| AlterObjectDependsStmt
| AlterObjectSchemaStmt
| AlterOwnerStmt
| AlterOperatorStmt
@ -8025,6 +8027,55 @@ opt_set_data: SET DATA_P { $$ = 1; }
| /*EMPTY*/ { $$ = 0; }
;
/*****************************************************************************
*
* ALTER THING name DEPENDS ON EXTENSION name
*
*****************************************************************************/
AlterObjectDependsStmt:
ALTER FUNCTION function_with_argtypes DEPENDS ON EXTENSION name
{
AlterObjectDependsStmt *n = makeNode(AlterObjectDependsStmt);
n->objectType = OBJECT_FUNCTION;
n->relation = NULL;
n->objname = $3->funcname;
n->objargs = $3->funcargs;
n->extname = makeString($7);
$$ = (Node *)n;
}
| ALTER TRIGGER name ON qualified_name DEPENDS ON EXTENSION name
{
AlterObjectDependsStmt *n = makeNode(AlterObjectDependsStmt);
n->objectType = OBJECT_TRIGGER;
n->relation = $5;
n->objname = list_make1(makeString($3));
n->objargs = NIL;
n->extname = makeString($9);
$$ = (Node *)n;
}
| ALTER MATERIALIZED VIEW qualified_name DEPENDS ON EXTENSION name
{
AlterObjectDependsStmt *n = makeNode(AlterObjectDependsStmt);
n->objectType = OBJECT_MATVIEW;
n->relation = $4;
n->objname = NIL;
n->objargs = NIL;
n->extname = makeString($8);
$$ = (Node *)n;
}
| ALTER INDEX qualified_name DEPENDS ON EXTENSION name
{
AlterObjectDependsStmt *n = makeNode(AlterObjectDependsStmt);
n->objectType = OBJECT_INDEX;
n->relation = $3;
n->objname = NIL;
n->objargs = NIL;
n->extname = makeString($7);
$$ = (Node *)n;
}
;
/*****************************************************************************
*
* ALTER THING name SET SCHEMA name
@ -13726,6 +13777,7 @@ unreserved_keyword:
| DELETE_P
| DELIMITER
| DELIMITERS
| DEPENDS
| DICTIONARY
| DISABLE_P
| DISCARD